Hydrogen Sulfide (H2S), Carbon Monoxide (CO), Methane (CH4), Oxygen (O2) 34 Liter $147.25 Hydrogen Sulfide (H2S), Carbon Monoxide (CO), Methane (CH4), Oxygen (O2) quantity Add to cart SKU: GFX34-155-5300-I Category: Gas Cylinders Description Description H2S 25 ppm/ CO 100 ppm/ CH4 2.5% (50% LEL)/ O2 18.0%/ N2 Related products Chlorine (Cl₂) Calibration Gas – 2 ppm – 60L Cylinder $323.00 Add to cart Hydrogen (H₂) Calibration Gas – 50% LEL – 103L Cylinder $95.00 Add to cart Methane (CH₄) Calibration Gas – 20% LEL – 103L Cylinder $95.00 Add to cart Ammonia (NH₃) Calibration Gas $304.00 Select options This product has multiple variants. The options may be chosen on the product page